leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

dma-debug: disable/enable irqs only once in device_dma_allocations

Browse Source 
There is no need to disable/enable irqs on each loop iteration. Just
disable irqs for the whole time the loop runs.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-06-08 15:46:19 +02:00
parent e7ed70eedc
commit be81c6ea23
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/dma-debug.c
View File

@ -649,15 +649,19 @@ static int device_dma_allocations(struct device *dev)
unsigned long flags;
int count = 0, i;
local_irq_save(flags);
for (i = 0; i < HASH_SIZE; ++i) {
spin_lock_irqsave(&dma_entry_hash[i].lock, flags);
spin_lock(&dma_entry_hash[i].lock);
list_for_each_entry(entry, &dma_entry_hash[i].list, list) {
if (entry->dev == dev)
count += 1;
}
spin_unlock_irqrestore(&dma_entry_hash[i].lock, flags);
spin_unlock(&dma_entry_hash[i].lock);
}
local_irq_restore(flags);
return count;
}